Apple Power Mac G4 - Page 226

Troubleshooting General/ Power Supply Verification - 28
Figure 3. Power Supply 22-Pin Connector and 4-Pin Connector
Note:
The four-pin connector (P4) supplies power to the
multiprocessor.
Pin 22+25V TRKL
Pin 21+5V
Pin 20+5V
Pin 19GND
Pin 18GND
Pin 17GND
Pin 16GND
Pin 15[Power On]
Pin 14GND
Pin 13-12V
Pin 12+3.3V
GNDPin 11
+12V Pin 10
+25V Pin 9
+3.3VPin 8
GNDPin 7
+5V Pin 6
GNDPin 5
+5V Pin 4
GNDPin 3
+3.3V Pin 2
+3.3VPin 1
+12V Pin 1
+12V Pin 2
COM Pin 3
COM Pin 4